JP6293101B2 - Interior parts for vehicles and manufacturing method thereof - Google Patents

Description

  The present invention relates to a vehicle interior part and a method for manufacturing the same.

  In vehicles such as automobiles, interior parts such as instrument panels (vehicle interior parts) are installed in the front part of the vehicle interior. For such interior parts, the skin material is stuck to the core material by superposing the heated skin material on the surface of the core material coated with adhesive and vacuum-adsorbing it (vacuum simultaneous crimping). (For example, refer to Patent Document 1).

JP 60-34846 A

  However, the interior parts for vehicles and the manufacturing method thereof described in Patent Document 1 have the following problems.

  That is, until now, the adhesive has been applied to the entire surface of the core material. For this reason, when the skin material is vacuum-adsorbed on the surface of the core material, if the skin material comes into contact with the corner portion of the core material, the core material of the skin material (the corner portion) is caused by the viscosity of the adhesive applied to the core material. As a result, local elongation occurs at the portion of the skin material that is in contact with the corner of the core material, and the above-mentioned portion of the skin material is torn, resulting in poor appearance of the interior parts. There is a risk of generating.

  Accordingly, the main object of the present invention is to solve the above-described problems.

In order to solve the above problems, the present invention is to provide an adhesive coating layer on the core material is provided, wherein the core material and the skin material, is fixed in a state superimposed through an adhesive coating layer Vehicle interior parts
The core material has a first surface and a second surface adjacent to the first surface;
A corner is formed at a boundary line portion between the first surface and the second surface,
An adhesive-unapplied portion is formed on the corner, a part of the first surface continuously formed from the corner, and a part of the second surface continuously formed from the corner. The adhesive coating layer is formed on the other part of the first surface and the other part of the second surface .

  According to the present invention, it is possible to prevent breakage of corner portions in an interior part formed by attaching a skin material to a core material by the above-described adhesive-unapplied portion.

1 is an overall view of an interior part for a vehicle according to an embodiment. It is a side view which shows the cross-section of the vehicle interior component of FIG. It is a top view which shows the masked core material (figure which shows a masking process). It is explanatory drawing (figure which shows an adhesive agent application process) which shows the state which apply | coats an adhesive agent to the masked core material. It is a top view which shows the core material in which the adhesive agent non-application part was formed. It is a top view of the core material similar to FIG. 5 in which the air hole was formed. It is a figure (figure showing a core material setting process) which shows the state where a core material which has an adhesive non-application part and an air hole was set to a metallic mold. It is sectional drawing of the core material which shows the film thickness of an adhesive bond layer. It is explanatory drawing which shows the state which provided the fine uneven | corrugated part in the adhesive agent non-application part. It is explanatory drawing (figure which shows a skin heating process) which shows the state which heats a skin material. It is explanatory drawing which shows the state which pushes up a core material with respect to a skin material (figure which shows a metal mold | die push-up process). It is explanatory drawing (figure which shows a vacuuming process) which shows the state of vacuum adsorption. It is a figure which shows the specific example of the core material which masked the corner | angular part on the left side. It is a figure which shows the specific example of the core material which masked the corner | angular part on the right side. It is a figure which shows the state which peeled off the masking tape with respect to the core material of FIG. It is explanatory drawing which shows the state which pushed up the core material with respect to the skin material, without providing an adhesive agent non-application part. It is a figure which shows the tearing of the skin material which arose in the left corner | angular part in FIG. It is a figure which shows the tear of the skin material which arose in the corner | angular part of the right side in FIG. It is a figure which shows the state of the corner | angular part on the right side of a skin material at the time of providing the adhesive agent non-application part.

Hereinafter, the present embodiment will be described in detail with reference to the drawings.
1 to 19 are for explaining this embodiment.

  <Configuration> The configuration of this embodiment will be described below.

  A vehicle such as an automobile is provided with an interior part (vehicle interior part 1) such as an instrument panel as shown in FIG. As shown in FIG. 2, the vehicle interior part 1 includes an adhesive coating layer 5 (or an adhesive layer) provided on one of the core material 3 and the skin material 4 and the core material 3 (heated). A) The skin material 4 is adhered to the core material 3 by being fixed by vacuum adsorption (vacuum simultaneous pressure molding) in a state where the skin material 4 is overlapped via the adhesive coating layer 5. .

  Here, although the vehicle interior component 1 has been described as an example of an instrument panel, it is not limited to the instrument panel. As the adhesive 2, an adhesive that is activated by heat is used. And the said adhesive agent coating layer 5 of required thickness is formed by apply | coating the adhesive agent 2 to the surface of the core material 3, or the back surface of the skin material 4. FIG. The core material 3 is formed of a hard resin. The skin material 4 is made of a soft resin.

  In contrast to the basic configuration as described above, this embodiment has the following configuration.

  (1) At this time, as shown in FIG. 3 to FIG. 5, the adhesive non-applied portion 12 (or non-fixed) where the adhesive 2 is not partially applied to the corner portion 11 of the core material 3 and the vicinity thereof. Part).

  Here, the corner | angular part 11 of the core material 3 is formed in the boundary line part of the upper surface and hand front surface in the case of an instrument panel. In this case, in particular, the both side positions in the vehicle width direction 17 and the like in the boundary line portion.

  The adhesive-unapplied portion 12 similar to the above may be formed not only on the corner portion 11 of the core material 3 but also on a portion where an extension or tear of the skin material 4 as will be described later is concerned. good.

  (2) As shown in FIGS. 6 and 7, the core material 3 has an air hole 21 at the position of the adhesive-unapplied portion 12.

  Here, the air hole 21 is a through hole for venting air, and one or more air holes 21 may be provided with respect to the position of the adhesive non-applied portion 12 depending on the size and shape of the adhesive non-applied portion 12. it can. The air holes 21 may be formed at the same time as the core material 3 is molded, or may be formed by post-processing after the core material 3 is molded and before the vacuum simultaneous press-molding. . Since the vacuum suction hole 25 is formed in the core material 3 in advance for simultaneous vacuum compression molding, the air hole 21 is preferably formed simultaneously with the vacuum suction hole 25. Alternatively, the air hole 21 may be used as a part of the vacuum suction hole 25. As shown in FIG. 8, the air holes 21 are preferably provided whenever the film thickness t of the adhesive 2 (adhesive coating layer 5) is larger than about 75 μm.

  (3) As shown in FIG. 9, the said core material 3 shall have the fine uneven | corrugated part 31 for the slipperiness improvement in the said adhesive agent unapplied part 12. FIG.

  Here, it is preferable that the fine irregularities 31 have a large number of smooth irregularities with rounded tips. The depth of the unevenness of the fine unevenness portion 31 is approximately 0.3 mm or less and preferably 0.05 mm or more. The planar shape of the fine concavo-convex portion 31 can be the same as the concavo-convex portion for decoration 35 such as a texture pattern or a geometric pattern provided on the surface of the skin material 4 for decoration. The fine irregularities 31 may be provided on the entire surface of the core material 3, or may be partially provided on the surface of the core material 3 where the adhesive has not been applied 12 or its peripheral position. In this case, the fine irregularities 31 are provided on the entire surface of the core material 3. The fine irregularities 31 may be formed simultaneously with the molding of the core material 3, or may be formed by post-processing after the core material 3 is molded and before the vacuum simultaneous pressure-bonding molding. good.

  In the case of the figure, the skin material 4 has a multilayer structure integrally having a foam layer 36 with poor slipperiness on the back side thereof.

  Hereinafter, the manufacturing method of the above-described vehicle interior part 1 will be described.

  In this vehicle interior part manufacturing method, the adhesive 2 is applied to one of the core material 3 or the skin material 4 and the heated skin material 4 is superposed on the surface of the core material 3 and vacuum-adsorbed. The skin material 4 is adhered to the core material 3.

  Here, the core material 3 to which the adhesive 2 of FIG. 5 is applied is set in a mold 41 (core material set mold) as shown in FIG. As shown in FIG. 10, both surfaces of the skin material 4 are heated by upper and lower heaters 43 and 44 while being sandwiched by clamps 42. Thereafter, the core material 3 and the skin material 4 are overlaid as shown in FIG. And after pushing up the metal mold | die 41 with the core material 3 and making the core material 3 contact the skin material 4, as shown in FIG. 12, vacuum suction is performed by evacuating the metal mold | die 41. As shown in FIG. In the core material 3 and the mold 41, vacuum suction holes 25 and 45 are respectively formed in advance.

  (4) In the above-described vehicle interior component manufacturing method, the adhesive 2 where the adhesive 2 is not applied is not applied to the corner 3 of the core material 3 or the skin material 4 applied with the adhesive 2 and the vicinity thereof. By forming the portion 12 so that the core material 3 and the skin material 4 are not bonded to each other at the adhesive-uncoated portion 12, the local elongation of the skin material 4 at the adhesive-uncoated portion 12 is alleviated. The tear of the skin material 4 due to local elongation is prevented.

  Specifically, as shown in FIGS. 13 and 14, the adhesive-unapplied portion 12 is formed by applying the adhesive 2 after applying the masking tape 55 to the corner portion 11 of the core material 3. Is done. As shown in FIG. 15, the masking tape 55 is peeled off after the adhesive 2 is applied.

  As shown in FIG. 16, the tear due to local elongation of the skin material 4 does not form the adhesive non-applied portion 12, but pushes up the die 41 together with the core material 3 to bring the core material 3 into contact with the skin material 4. As shown in FIGS. 17 and 18, the slipperiness of the skin material 4 with respect to the core material 3 (corner portion 11) is hindered by the viscosity of the adhesive 2 applied to the core material 3. Caused (Tear 51). On the other hand, the one provided with the adhesive non-applied portion 12 is less likely to cause the above-described slipperiness inhibition, and as shown in FIG.

  (5) At this time, an air hole 21 is provided at the position of the adhesive non-applied portion 12 of the core material 3 and is enclosed in the adhesive non-applied portion 12 when the core material 3 and the skin material 4 are adhered. The air that is to be (will be) is allowed to escape from the air holes 21.

  (6) Furthermore, a fine uneven portion 31 is provided on the adhesive-unapplied portion 12 of the core material 3 so that the adhesive-applied portion 12 of the core material 3 is not applied (when the mold is pushed up or vacuumed). The slipperiness of the skin material 4 is improved.

  More specifically, the interior parts manufacturing method for a vehicle first masks the corner 11 of the core material 3 with a masking jig or masking tape 55 (masking process) as shown in FIG. In this state, as shown in FIG. 4, the adhesive 2 is applied to the surface side of the core material 3, and as shown in FIG. 5, the adhesive 2 layer (adhesive application) is applied to the surface side of the core material 3. The layer 5) and the adhesive-unapplied portion 12 where the adhesive 2 is not applied are formed by masking.

  The adhesive 2 is sprayed onto the entire surface of the core material 3 using a spray nozzle 56 or the like. The adhesive-unapplied portion 12 is naturally formed by attaching a masking tape 55 to the surface of the core material 3 or attaching a mask member.

  Note that the air holes 21 and the fine irregularities 31 described above are provided before the adhesive application step.

  Then, using the core material 3 as described above, vacuum simultaneous crimping is performed.

  That is, in the core material setting step, the core material 3 is set in the mold 41 as shown in FIG. Further, in the skin heating process, as shown in FIG. 10, the skin material 4 sandwiched between the clamps 42 is heated by heaters 43 and 44 from above and below. Then, in the mold push-up step, as shown in FIG. 11, the heated skin material 4 is disposed above the core material 3 set in the mold 41, and the core material 3 is covered with the mold 41. Push up to material 4.

  Further, in the evacuation step, the skin material 4 is vacuum-sucked into the core material 3 through the mold 41 and the core material 3 as shown in FIG. By the above, the skin material 4 is stuck on the core material 3, and the vehicle interior component 1 is molded.

  <Effect> According to this embodiment, the following effects can be obtained.

(Operation effect 1)
The vehicle interior part 1 has an adhesive coating layer 5 provided on one of the core material 3 and the skin material 4, and the core material 3 and the (heated) skin material 4, It is manufactured by being fixed by vacuum suction in a state of being overlapped (the skin material 4 is stuck to the core material 3).

  At this time, an adhesive-unapplied portion 12 to which the adhesive 2 was not partially applied was formed on the corner portion 11 of the core material 3 and the vicinity thereof. This prevents the core material 3 and the skin material 4 from being bonded to each other at the adhesive-unapplied portion 12 around the corner 11 of the core material 3 when the core material 3 and the skin material 4 are adhered. Thus, the local elongation of the skin material 4 in the adhesive-unapplied portion 12 can be relaxed, and the occurrence of tearing due to the local elongation of the skin material 4 can be prevented. As a result, it is possible to eliminate the appearance defects such as tearing of the skin material 4 and to manufacture the high-quality vehicle interior part 1 with a high yield. In addition, since it is only necessary to add a masking process to the adhesive application process for the core material 3, there is no major process change and the burden on the operator is small.

  As a result of various experiments, it was confirmed that such tearing of the skin material 4 is particularly likely to occur when the skin material 4 is a single layer and thin. The thickness of the skin material 4 that easily breaks was generally less than 1.5 mm. Therefore, when the skin material 4 having a thickness of less than 1.5 mm is used, it is preferable that the skin material 4 is adhered after the adhesive uncoated portion 12 is formed on the core material 3. Even in the case of the skin material 4 having a thickness of 1.5 mm or more, tearing may occur depending on the shape of the corner portion 11, and in this case, the adhesive-uncoated portion 12 is formed. Is desirable.

(Operation effect 2)
An air hole 21 was provided at the position of the adhesive-uncoated portion 12 in the core material 3. With the air holes 21, a minute amount of air that is trapped inside the adhesive-uncoated portion 12 when the core material 3 and the skin material 4 are attached can be extracted from the air holes 21. As a result, after the core material 3 and the skin material 4 are adhered, for example, a small amount of air remaining in a slight gap inside the adhesive-uncoated portion 12 is thermally expanded, and the skin material 4 is thermally expanded by this thermal expansion. It is possible to prevent the occurrence of a problem that a boundary step is generated between the applied portion of the adhesive 2 and the adhesive-unapplied portion 12. Note that the thermal expansion of a small amount of air remaining inside the adhesive-unapplied portion 12 is likely to occur, for example, at high temperatures in summer or during a heat resistance test after manufacturing the vehicle interior part 1.

  As a result of various experiments, such a boundary step is likely to occur when the film thickness t (dry film thickness) of the adhesive 2 (adhesive coating layer 5) is large, and conversely, the film thickness t of the adhesive 2 Therefore, the air holes 21 may be provided only when the film thickness t of the adhesive 2 is large. The film thickness t of the adhesive 2 in which the boundary line level difference is approximately 75 μm or more (see FIG. 8). Therefore, when the film thickness t of the adhesive 2 is less than 75 μm, the air holes 21 may not be provided (although they may be provided).

(Operation effect 3)
A fine uneven portion 31 was provided on the adhesive-uncoated portion 12 of the core material 3. The fine uneven portion 31 reduces the contact area between the adhesive-uncoated portion 12 and the skin material 4 (for example, a state close to point contact), so the adhesive-uncoated portion 12 and the skin material 4 The frictional resistance between the two is reduced, and the slipperiness can be improved accordingly. This is particularly effective in the case where the skin material 4 has a multilayer structure in which the back surface side has a foam layer 36 with poor slipperiness.

  Although the embodiments have been described in detail with reference to the drawings, the embodiments are only examples. Therefore, the present invention is not limited only to the configuration of the embodiment, and it is needless to say that even if there is a design change or the like without departing from the scope of the invention. Further, for example, when each embodiment includes a plurality of configurations, it is a matter of course that possible combinations of these configurations are included even if not specifically described. Further, when a plurality of embodiments and modification examples are disclosed, it is needless to say that possible combinations of configurations extending over these are included even if not specifically described. Further, the configuration depicted in the drawings is of course included even if not particularly described. Further, when there is a term of “etc.”, it is used in the sense that the equivalent is included. In addition, when there are terms such as “almost”, “about”, “degree”, etc., they are used in the sense that they include those in the range and accuracy recognized by common sense.

DESCRIPTION OF SYMBOLS 1 Interior component for vehicles 2 Adhesive 3 Core material 4 Skin material 5 Adhesive application layer 11 Corner | angular part 12 Adhesive non-application part 21 Air hole 31 Fine uneven | corrugated part 51 Rupture part

Claims (7)

With the adhesive coating layer on the core material is provided, and the core material and the skin material, the interior component for a vehicle which is fixed in a state superimposed via an adhesive coating layer,
The core material has a first surface and a second surface adjacent to the first surface;
A corner is formed at a boundary line portion between the first surface and the second surface,
An adhesive-unapplied portion is formed on the corner, a part of the first surface continuously formed from the corner, and a part of the second surface continuously formed from the corner. An interior part for a vehicle formed by forming the adhesive coating layer on the other part of the first surface and the other part of the second surface . The vehicle interior part according to claim 1,
The vehicle interior part, wherein the core member has an air hole at the position where the adhesive is not applied. An interior part for a vehicle according to claim 1 or claim 2,
The interior member for a vehicle according to claim 1, wherein the core material has a fine uneven portion for improving slipperiness in the portion where the adhesive is not applied. In the interior parts manufacturing method for a vehicle, in which an adhesive is applied to the core material, and the surface material is superposed on the surface of the core material and vacuum-adsorbed, thereby attaching the skin material to the core material.
The core material has a first surface and a second surface adjacent to the first surface;
A corner is formed at a boundary line portion between the first surface and the second surface,
An adhesive-uncoated portion is formed on the corner, a part of the first surface continuously formed from the corner, and a part of the second surface continuously formed from the corner. And forming the adhesive coating layer on the other part of the first surface and the other part of the second surface , thereby reducing the local elongation of the skin material in the adhesive-uncoated part, A method for manufacturing an interior part for a vehicle, wherein tearing due to local elongation of the vehicle is prevented. The vehicle interior part manufacturing method according to claim 4,
An air hole is provided at a position of the adhesive-unapplied portion of the core material so that air contained in the adhesive-unapplied portion can be removed from the air hole when the core material and the skin material are attached. A method for manufacturing an interior component for a vehicle. A vehicle interior part manufacturing method according to claim 4 or 5,
A method for manufacturing an interior component for a vehicle, wherein a fine uneven portion is provided in the adhesive-unapplied portion of the core material to improve the slipping property of the skin material with respect to the adhesive-unapplied portion of the core material. The vehicle interior part according to any one of claims 1 to 3,
The core has a third surface adjacent to the first surface and the second surface;
The adhesive non-application part is formed on a part of the third surface side formed continuously from the corner part, and the adhesive application layer is formed on the other part of the third surface. Characteristic interior parts for vehicles.